Issue_28  Bugfix for handling undefs
Issue_28  Bugfix for handling undefs

Without this patch, use of undef in a parameter that can be an array
would result in firewall resources being created with unexpected values.

This changes behaviour so that firewall resources are created without
that parameter included.

alexharv074/puppet-firewall_multi,alexharv074/puppet-firewall_multi,alexharv074/puppet-firewall_multi